Instrument barrel



FIG. 1 is a front elevational view of my new design;

FIG. 2 is a right side view thereof, the left side view being a mirrorimage; and,

FIG. 3 is the top view thereof.

The stipple-like pattern shown on the clip and globe in FIG. 1illustrate environmental matter, which form no part of the claimeddesign.

The ornamental design for an instrument barrel, as shown and described.